2019-12-24 23:48:36 -0500 | commented question | How to make Taylor expansion with fixed numerical precision? Thanks @Nasser. What I need is a numerical solution. |

2019-12-24 22:37:23 -0500 | asked a question | How to make Taylor expansion with fixed numerical precision? Following command shows result: The precision of result has too many bits, what I want is 3 bits, such as: How to do it? Thanks for your help. |

2019-09-13 04:31:37 -0500 | asked a question | More physics constants in Sagemath I can you following command to load physics constants h and c: But, how can I load more physics constants such as Bohr magneton? Following command doesn't work, I load physics constant from https://docs.scipy.org/doc/scipy/refe... Thanks for help. |

2019-09-08 01:53:38 -0500 | commented question | How to show more results in sagemathcell? Thanks slelievre, is it possible to display full output in sagemathcell (not in Jupyter), not only last result? @slelievre |

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2019-07-03 08:56:25 -0500 | asked a question | Is there a way to remove "Terms of Service" popup? My dear friends, after using sagemath for a few of month, I want to introduce more people to use sagemath, because sagemath is really useful and powerful. I live in China, and we have GFW, hence mnay site such as google, facebook, are blocked. I am not sure if sagemath.org would be blocked, hence I want to setup own sagemath server. Thanks for the open source of sagemath, I almost have my own sagemath server! When I try embedded sagemath code in some sagemathcell, and Evaluate code, it always popup the "Terms of Service". Is there a way to remove it? Please visit http://sagemath.askplanck.cn Put any sagemath code, such as, 1+2 You will find the popup. Thanks for help! John |

2019-05-29 22:33:14 -0500 | commented answer | How to show more results in sagemathcell? Thank you very much. I am working of @slelievre 's suggestion. |

2019-05-26 20:27:09 -0500 | commented answer | How to show more results in sagemathcell? Thank you, FrédéricC and Juanjo. But your answers is not what I want. I wish the ouput has 3 lines. My example is for simplity, other example cannot be written as an array. Is there any other suggestion? |

2019-05-26 07:47:46 -0500 | asked a question | How to show more results in sagemathcell? If I put following comand in http://sagemath.askplanck.cn/ If Evaluate above command, I can only get last result: 300. What I wish is too get 3 results one by one in In https://cocalc.com/, if I put above comand, it shows 3 results. This is nice,and is what I want. Is it possible in such like sagmathcell? PS. I don't want to put command as following (which can show 3 results): Thank you very much for your suggestion. John |

2019-04-11 01:37:26 -0500 | commented answer | Cannot solve differential equation (Lane-Emden equation) numerically Thank you very muchfor you nice answer, Mr. Buring. For the first plot, is there a simple way to find t where y0=0? |

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2019-03-07 05:06:38 -0500 | asked a question | Cannot solve differential equation (Lane-Emden equation) numerically Hi, my friends, I tried to solve Lane-Emden equation, as model of white dwarf, $$ \frac{d^2x}{dt^2} +\frac2 t \frac{dx}{dt} + x^n = 0, ~~~~ where ~~~~n=\frac 3 2 $$ and I have some troubles in sagemath. I am using following code: Above code is very similar of the example in sagemath reference: Van der Pol equation Both equations (Lane-Emden and Van der Pol) are non-linear differential equation, therefore, are not easy to solve. I don't know where comes to problem in above codes, can someone give me a help? John |

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